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129 lines
3.9 KiB
C++
129 lines
3.9 KiB
C++
/**
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* The MIT License (MIT)
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*
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* Copyright (c) 2016 by Daniel Eichhorn
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* Copyright (c) 2016 by Fabrice Weinberg
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Credits for parts of this code go to Mike Rankin. Thank you so much for sharing!
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*/
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#ifndef SH1106Spi_h
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#define SH1106Spi_h
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#include "OLEDDisplay.h"
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#include <SPI.h>
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class SH1106Spi : public OLEDDisplay {
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private:
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uint8_t _rst;
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uint8_t _dc;
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public:
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SH1106Spi(uint8_t _rst, uint8_t _dc) {
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this->_rst = _rst;
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this->_dc = _dc;
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}
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bool connect(){
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pinMode(_dc, OUTPUT);
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pinMode(_rst, OUTPUT);
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SPI.begin ();
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SPI.setClockDivider (SPI_CLOCK_DIV2);
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// Pulse Reset low for 10ms
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digitalWrite(_rst, HIGH);
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delay(1);
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digitalWrite(_rst, LOW);
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delay(10);
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digitalWrite(_rst, HIGH);
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return true;
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}
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void display(void) {
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#ifdef OLEDDISPLAY_DOUBLE_BUFFER
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uint8_t minBoundY = ~0;
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uint8_t maxBoundY = 0;
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uint8_t minBoundX = ~0;
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uint8_t maxBoundX = 0;
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uint8_t x, y;
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// Calculate the Y bounding box of changes
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// and copy buffer[pos] to buffer_back[pos];
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for (y = 0; y < (DISPLAY_HEIGHT / 8); y++) {
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for (x = 0; x < DISPLAY_WIDTH; x++) {
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uint16_t pos = x + y * DISPLAY_WIDTH;
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if (buffer[pos] != buffer_back[pos]) {
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minBoundY = _min(minBoundY, y);
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maxBoundY = _max(maxBoundY, y);
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minBoundX = _min(minBoundX, x);
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maxBoundX = _max(maxBoundX, x);
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}
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buffer_back[pos] = buffer[pos];
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}
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optimistic_yield(10000);
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}
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// If the minBoundY wasn't updated
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// we can savely assume that buffer_back[pos] == buffer[pos]
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// holdes true for all values of pos
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if (minBoundY == ~0) return;
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// Calculate the colum offset
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uint8_t minBoundXp2H = (minBoundX + 2) & 0x0F;
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uint8_t minBoundXp2L = 0x10 | ((minBoundX + 2) >> 4 );
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for (y = minBoundY; y <= maxBoundY; y++) {
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sendCommand(0xB0 + y);
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sendCommand(minBoundXp2H);
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sendCommand(minBoundXp2L);
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digitalWrite(_dc, HIGH); // data mode
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for (x = minBoundX; x <= maxBoundX; x++) {
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SPI.transfer(buffer[x + y * DISPLAY_WIDTH]);
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}
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optimistic_yield(10000);
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}
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#else
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for (uint8_t y=0; y<DISPLAY_HEIGHT/8; y++) {
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sendCommand(0xB0 + y);
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sendCommand(0x02);
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sendCommand(0x10);
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digitalWrite(_dc, HIGH); // data mode
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for( uint8_t x=0; x < DISPLAY_WIDTH; x++) {
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SPI.transfer(buffer[x + y * DISPLAY_WIDTH]);
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}
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optimistic_yield(10000);
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}
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#endif
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}
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private:
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inline void sendCommand(uint8_t com) __attribute__((always_inline)){
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digitalWrite(_dc, LOW);
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SPI.transfer(com);
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}
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};
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#endif
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